Frictional heat problem and its evolution. Part 1. Blok model and its improvement.

The paper reviews the main stages of the formulation, development, and improvement of the frictional heat problem. At present its evolution enables to proceed from problems for a local contact spot to problems for specific full-sized friction units. Features of the consideration of some basic parameters when formulating and solving analytically the frictional heat problem for tooth gears are discussed and the real values of the essential parameters are specified. These parameters are the contact duration factor, the temperature flash duration, and the real temperatures capable of inducing structural and phase transformations in surface and subsurface layers of the mated parts. [ABSTRACT FROM AUTHOR]